Outdoor/Indoor Keypad for gates and doors with up to 480 users. The SDC 925 EntryCheck™ is a stand alone digital keypad designed to control access of a single entry point for facilities with up to 480 users. Each user is assigned a personal identification number (PIN). Keypad entry of a valid one to six digit code activates one or both of the output relays which releases an electric door lock or triggers a gate operator.